| 000 | 00452nam a22001337a 4500 | ||
|---|---|---|---|
| 008 | 230419b |||||||| |||| 00| 0 eng d | ||
| 040 |
_aNational Science Library _cNational Science Library |
||
| 245 |
_aCentral public health engineering research institute Nagpur, India _c/ World Health Organization |
||
| 260 |
_aGeneva: _bWorld Health Organization, _c1968 |
||
| 300 | _a59p. | ||
| 650 | _2Economics | ||
| 653 | _aEnvironment | ||
| 942 |
_2udc _cREF |
||
| 999 |
_c56140 _d56140 |
||